A comprehensive energy system evaluation method based on multi-source heat pumps

Abstract

The present invention relates to the field of multi-source heat pump integrated energy system evaluation, and specifically discloses an integrated energy system evaluation method based on a multi-source heat pump. The present invention evaluates the energy efficiency of the multi-source heat pump integrated energy system, which is conducive to timely adjusting the system operation parameters and improving the energy efficiency level of the system; evaluates the operation reliability of the multi-source heat pump integrated energy system, which is conducive to timely warning of faults and improving the service life of system equipment; evaluates the operation stability of the multi-source heat pump integrated energy system, which is conducive to timely maintenance of the system; evaluates the environmental adaptability of the multi-source heat pump integrated energy system, which is conducive to ensuring that the system can play a maximum role in various environments and provide a continuous and stable energy supply; evaluates the energy self-sufficiency rate of the multi-source heat pump integrated energy system, which is conducive to improving the energy independence of the system and reducing energy costs, and at the same time provides a basis for optimizing system design.

Description

Technical Field

[0001] The invention relates to the field of multi-source heat pump integrated energy system evaluation, and in particular to an integrated energy system evaluation method based on a multi-source heat pump. Background Art

[0002] The integrated energy system of multi-source heat pump is a system that integrates multiple energy forms and uses multi-source heat pump as the core equipment to achieve efficient energy utilization. The system usually combines multiple renewable energy sources such as solar energy, geothermal energy, air energy, and traditional energy to provide heating, cooling, hot water and other services for buildings or industrial facilities through intelligent control and optimized scheduling.

[0003] Monitoring and evaluating the integrated energy system of multi-source heat pumps can improve energy utilization efficiency, ensure stable system operation, optimize system design and management, and promote sustainable development, which is of practical significance.

[0004] However, the existing multi-source heat pump integrated energy system evaluation methods still have some limitations and shortcomings in practical applications.

[0005] For example, the existing Chinese patent with the publication number CN117291338A discloses an integrated energy system evaluation method and device based on coupled multi-source heat pumps, including: obtaining the original data of the integrated energy system to be evaluated and the capacity configuration scheme to be evaluated; obtaining a target indicator weight set from a plurality of pre-constructed indicator weight sets based on the capacity configuration scheme to be evaluated; calculating the comprehensive performance score of the capacity configuration scheme to be evaluated using a preset formula according to the target indicator weight set, the original data and the pre-selected evaluation indicators, and obtaining an evaluation result; wherein the indicator weight set is constructed for different capacity configuration schemes based on the pre-constructed system operation mechanism, the model of the energy core equipment of the integrated energy system to be evaluated and the load data. The invention constructs an indicator weight set for different capacity configuration schemes, has a simple algorithm, reduces the amount of calculation, and uses a preset formula to evaluate the integrated energy system to be evaluated according to the indicator weight set, which is more targeted.

[0006] The above patent focuses on the system design stage of the multi-source heat pump integrated energy system. By comparing the comprehensive performance of different capacity configuration schemes, the best capacity configuration scheme can be screened, thereby providing a reference basis for the optimal design of the system. However, it does not conduct specific and quantitative analysis and evaluation of the actual operation of the multi-source heat pump integrated energy system, which is not conducive to better ensuring the efficient and stable operation of the system and helping managers to formulate scientific and reasonable operation strategies and maintenance plans. Summary of the invention

[0007] In response to the above problems, the present invention proposes an integrated energy system evaluation method based on a multi-source heat pump. The specific technical solution is as follows: A comprehensive energy system evaluation method based on a multi-source heat pump comprises the following steps: Step 1, energy system energy efficiency analysis: Obtain the working hours, energy input and energy output of each energy supply subsystem in the multi-source heat pump integrated energy system in the monitoring period in the heating mode and the cooling mode, and analyze the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system.

[0008] Step 2: Energy system operation reliability analysis: Obtain the failure rate, mean time between failures, and mean maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system, and analyze the operation reliability evaluation coefficient of the multi-source heat pump integrated energy system.

[0009] Step 3. Energy system operation stability analysis: Obtain the energy supply stability information and performance parameter stability information of the multi-source heat pump integrated energy system, where the energy supply stability information includes the energy supply stability coefficient, energy conversion efficiency stability coefficient, and energy storage capacity stability coefficient; the performance parameter stability information includes the temperature stability coefficient, pressure stability coefficient, and flow stability coefficient; analyze the operation stability evaluation coefficient of the multi-source heat pump integrated energy system.

[0010] Step 4: Analysis of environmental adaptability of energy system: Obtain the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, and analyze the environmental adaptability evaluation coefficient of the multi-source heat pump integrated energy system.

[0011] Step 5. Analysis of energy self-sufficiency rate of energy system: Obtain the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period, and analyze the energy self-sufficiency rate evaluation coefficient of the multi-source heat pump integrated energy system.

[0012] Step 6. Comprehensive evaluation feedback of the energy system: Based on the energy efficiency evaluation coefficient, operation reliability evaluation coefficient, operation stability evaluation coefficient, environmental adaptability evaluation coefficient, and energy self-sufficiency evaluation coefficient of the multi-source heat pump comprehensive energy system, analyze the comprehensive evaluation index of the multi-source heat pump comprehensive energy system and provide feedback.

[0013] Compared with the prior art, the integrated energy system evaluation method based on multi-source heat pumps described in the present invention has the following beneficial effects: 1. The present invention evaluates the energy efficiency of the multi-source heat pump integrated energy system by monitoring the energy input and output of various energy supply subsystems in the multi-source heat pump integrated energy system, which is conducive to timely adjusting the system operating parameters, optimizing energy distribution, effectively reducing energy waste, and improving the energy efficiency level of the system.

[0014] 2. The present invention evaluates the operational reliability of the multi-source heat pump integrated energy system by monitoring the failure rate, mean time between failures, and maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system, which is beneficial to reducing the maintenance cost of the system and increasing the service life of the system equipment.

[0015] 3. The present invention evaluates the operating stability of the multi-source heat pump integrated energy system by acquiring the energy supply stability information and performance parameter stability information of the multi-source heat pump integrated energy system, which is conducive to timely warning of faults and targeted maintenance.

[0016] 4. The present invention monitors the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, evaluates the environmental adaptability of the multi-source heat pump integrated energy system, and can determine the performance of the system under different environmental conditions, which is beneficial to ensure that the system can play its role to the maximum extent in various environments and provide continuous and stable energy supply.

[0017] 5. The present invention, by evaluating the energy self-sufficiency rate of the multi-source heat pump integrated energy system, is conducive to improving the energy independence of the system, reducing energy costs, promoting sustainable development, and providing a basis for optimizing system design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the method flow of the present invention.

[0020] Figure 2 It is a structural block diagram of the present invention.

[0021] Figure 3 This is a composition diagram of the multi-source heat pump integrated energy system of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1 and Figure 2As shown, the present invention provides an integrated energy system evaluation method based on a multi-source heat pump, comprising the following steps: Step 1, energy system energy efficiency analysis: obtaining the working hours, energy input and energy output of each type of energy supply subsystem in the multi-source heat pump integrated energy system in the monitoring period in the heating mode and the cooling mode respectively, and analyzing the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system.

[0024] As a preferred solution, the specific analysis process of step one includes: setting the duration of the monitoring period, and obtaining the energy input, energy output, and working time of each operation of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode and the cooling mode during the monitoring period through energy measuring instruments installed in the various energy supply subsystems in the multi-source heat pump integrated energy system.

[0025] It should be noted that the integrated energy system of multi-source heat pump is a system that integrates multiple energy forms and uses multi-source heat pump as the core equipment to achieve efficient energy utilization. The system usually combines multiple renewable energy sources such as solar energy, geothermal energy, air energy, water energy, and traditional energy such as biomass energy to provide heating, cooling, hot water and other services for buildings or industrial facilities through intelligent control and optimized scheduling.

[0026] It should be noted that, see Figure 3 As shown, the comprehensive energy system of the multi-source heat pump includes an energy input part, an energy conversion and transmission part, an energy storage part, and a control and monitoring part. The energy input part includes a solar thermal collector, an air source heat pump module, a ground source heat pump module, other waste heat recovery devices, etc. The energy conversion and transmission part includes a compressor, an evaporator, a condenser, a throttling device, a heat exchanger, a transmission pipeline and a pump, etc. The energy storage part includes a hot water tank, an energy storage device, etc. The control and monitoring part includes a control system, a sensor, a monitoring terminal, etc.

[0027] In a specific embodiment, the energy sources of the multi-source heat pump integrated energy system include solar energy, air thermal energy and ground source thermal energy. The various energy supply subsystems in the multi-source heat pump integrated energy system are solar thermal collection system, air source heat pump system and ground source heat pump system. The solar thermal collection system uses a solar collector to collect solar radiation energy and convert it into thermal energy; the air source heat pump system uses air as a low-temperature heat source, absorbs heat from the air through an evaporator, and increases the temperature after compression by a compressor to become a high-temperature heat source; the ground source heat pump system uses the relative constant temperature characteristics of underground soil, groundwater, etc., and exchanges heat with the underground through a buried pipe heat exchanger. It absorbs heat from the underground in winter to achieve heating, and releases heat to the underground in summer to achieve cooling.

[0028] In another specific embodiment, various types of energy supply subsystems in the multi-source heat pump integrated energy system can also be called energy collection and conversion subsystems or multi-energy complementary heat source subsystems.

[0029] It should be noted that the multi-source heat pump integrated energy system has a two-way function. It can be used for heating in winter and cooling in summer. It uses the working principle of the heat pump and different energy sources such as solar energy, air energy, geothermal energy, etc. to achieve energy transfer and conversion.

[0030] It should be noted that the energy measuring instruments are installed in key locations of various energy supply subsystems in the multi-source heat pump integrated energy system, such as energy input pipelines, energy output pipelines, equipment connections, etc., and the energy measuring instruments include but are not limited to: electricity meters, gas flow meters, calorimeters, etc.

[0031] It should be noted that the energy input of various energy supply subsystems in the multi-source heat pump integrated energy system includes but is not limited to the amount of electricity and gas consumed, etc., and the energy output includes but is not limited to the amount of hot water heat produced and the amount of cooling provided.

[0032] As a preferred solution, the specific analysis process of step one also includes: according to the energy input and energy output of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, the energy utilization efficiency calculation formula is used to obtain the energy utilization efficiency of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, and the average value is calculated to obtain the average energy utilization efficiency of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, which is recorded as , Indicates the first The number of the energy supply subsystem, .

[0033] It should be noted that the calculation formula for energy utilization efficiency is the ratio of energy output to energy input.

[0034] In a specific embodiment, for a multi-source heat pump integrated energy system driven by electric energy and utilizing air energy and geothermal energy simultaneously, the amount of electricity input into the system is measured by an electric energy meter, the amount of hot water heat output by the system is measured by a calorimeter, and the energy utilization efficiency is calculated according to the energy utilization efficiency calculation formula.

[0035] Obtain the cumulative working time of various energy supply subsystems in the multi-source heat pump integrated energy system in the heating mode during the monitoring period and record it as .

[0036] It should be noted that the working hours of each operation of various energy supply subsystems in the multi-source heat pump integrated energy system in the heating mode during the monitoring period are accumulated to obtain the cumulative working hours of various energy supply subsystems in the heating mode in the multi-source heat pump integrated energy system during the monitoring period.

[0037] By analyzing the formula Get the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system in heating mode ,in Indicates the correction factor of the energy efficiency evaluation coefficient in the preset heating mode, Indicates the preset multi-source heat pump integrated energy system Reference energy utilization efficiency of the energy supply subsystem.

[0038] It should be noted that the correction factor of the energy efficiency evaluation coefficient in the heating mode plays the role of amplifying, reducing or rounding the energy efficiency evaluation coefficient in the heating mode to facilitate calculation and analysis.

[0039] It should be noted that the reference energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system is obtained through historical experience or provided by the manufacturer.

[0040] In another specific embodiment, according to the energy input and energy output of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, the total energy input and total energy output of the multi-source heat pump integrated energy system in the heating mode during the monitoring period are accumulated to further evaluate the energy efficiency of the multi-source heat pump integrated energy system in the heating mode.

[0041] As a preferred solution, the specific analysis process of step 1 also includes: Similarly, obtaining the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system in the cooling mode, and recording it as .

[0042] By analyzing the formula Get the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system ,in Respectively represent the weight factors of the preset heating mode and cooling mode, .

[0043] It should be noted that the weight factors of the heating mode and the cooling mode are set according to their importance in evaluating the energy efficiency of the multi-source heat pump integrated energy system. In a specific embodiment, the weight factors of the heating mode and the cooling mode are 0.5 and 0.5, respectively.

[0044] In this embodiment, the present invention evaluates the energy efficiency of the multi-source heat pump integrated energy system by monitoring the energy input and output of various energy supply subsystems in the multi-source heat pump integrated energy system, which is conducive to timely adjusting the system operating parameters, optimizing energy distribution, effectively reducing energy waste, and improving the energy efficiency level of the system.

[0045] Step 2: Energy system operation reliability analysis: Obtain the failure rate, mean time between failures, and mean maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system, and analyze the operation reliability evaluation coefficient of the multi-source heat pump integrated energy system.

[0046] As a preferred solution, the specific analysis process of step 2 is: obtaining the historical operating time, historical failure times, and the time points and maintenance times of each historical failure of various energy supply subsystems in the multi-source heat pump integrated energy system.

[0047] It should be noted that the historical operation logs of various energy supply subsystems in the multi-source heat pump integrated energy system stored in the database are extracted to obtain the historical operation time, historical failure times, time points of each historical failure and maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system.

[0048] According to the historical operation time and historical failure times of various energy supply subsystems in the multi-source heat pump integrated energy system, combined with the calculation formula of the failure rate, the failure rate of various energy supply subsystems in the multi-source heat pump integrated energy system is obtained, which is recorded as .

[0049] It should be noted that the calculation formula for the failure rate is failure rate = historical number of failures / historical operating time.

[0050] Obtain the interval between each historical fault and the previous adjacent fault of each energy supply subsystem in the multi-source heat pump integrated energy system, and calculate the average value to obtain the average fault-free time of each energy supply subsystem in the multi-source heat pump integrated energy system, which is recorded as .

[0051] Get the average maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system and record it as .

[0052] It should be noted that the average maintenance time of each historical failure of each energy supply subsystem in the multi-source heat pump integrated energy system is calculated to obtain the average maintenance time of each energy supply subsystem in the multi-source heat pump integrated energy system.

[0053] By analyzing the formula Obtain the operation reliability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset operational reliability evaluation coefficient, Indicates the preset multi-source heat pump integrated energy system The impact weight of the energy supply subsystem, , represents a natural constant, They represent the preset thresholds of failure rate, mean time between failures and mean repair time, respectively. They represent the weights of the preset failure rate, mean time between failures and mean maintenance time, respectively. .

[0054] It should be noted that the correction factor of the operation reliability evaluation coefficient plays the role of amplifying, reducing or rounding the operation reliability evaluation coefficient to facilitate calculation and analysis.

[0055] It should be noted that the influence weights of various energy supply subsystems in the multi-source heat pump integrated energy system are set according to their importance. In a specific embodiment, the influence weights of various energy supply subsystems in the multi-source heat pump integrated energy system are equal.

[0056] It should be noted that the weights of the failure rate, mean time between failures and mean maintenance time are set according to their importance in evaluating the reliability of system operation. In a specific embodiment, the weights of the failure rate, mean time between failures and mean maintenance time are 0.4, 0.4 and 0.2 respectively.

[0057] It should be noted that the lower the failure rate, the longer the mean time between failures and the shorter the mean maintenance time, the higher the reliability of the system operation.

[0058] In this embodiment, the present invention evaluates the operational reliability of the multi-source heat pump integrated energy system by monitoring the failure rate, mean time between failures, and maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system, which is beneficial to reducing the maintenance cost of the system and increasing the service life of the system equipment.

[0059] Step 3. Energy system operation stability analysis: Obtain the energy supply stability information and performance parameter stability information of the multi-source heat pump integrated energy system, where the energy supply stability information includes the energy supply stability coefficient, energy conversion efficiency stability coefficient, and energy storage capacity stability coefficient; the performance parameter stability information includes the temperature stability coefficient, pressure stability coefficient, and flow stability coefficient; analyze the operation stability evaluation coefficient of the multi-source heat pump integrated energy system.

[0060] As a preferred solution, the specific analysis process of step three includes: S1: dividing the monitoring period according to the preset equal time interval principle to obtain each time period within the monitoring period, and obtaining the energy supply of each energy supply subsystem in the multi-source heat pump integrated energy system in each time period within the monitoring period.

[0061] In a specific embodiment, the monitoring period may be one week, one month, one year, etc., and the time intervals for dividing the monitoring period may be one day, one week, one month, etc.

[0062] Draw the energy supply time series diagram of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, obtain the standard deviation, coefficient of variation, fluctuation range, and fluctuation frequency of energy supply of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, substitute them into the preset relationship function between the standard deviation, coefficient of variation, fluctuation range, fluctuation frequency of energy supply and the energy supply stability factor, obtain the energy supply stability factor of various energy supply subsystems in the multi-source heat pump integrated energy system, and calculate the weighted average value to obtain the energy supply stability coefficient of the multi-source heat pump integrated energy system, which is recorded as .

[0063] It should be noted that, with the time period as the horizontal axis and the energy supply as the vertical axis, the mathematical model establishment method is used to draw the energy supply time series diagram of various energy supply subsystems in the multi-source heat pump integrated energy system within the monitoring period.

[0064] It should be noted that energy supply time series graphs can be drawn using charting software or programming languages. Energy supply time series graphs can be used to observe characteristics such as trends, fluctuations, and periodicity of energy supply.

[0065] It should be noted that the coefficient of variation is the ratio of the standard deviation to the mean. The larger the coefficient of variation, the greater the dispersion of the data relative to the mean, that is, the greater the fluctuation of the data, indicating that the stability of energy supply is low.

[0066] It should be noted that the weights of the energy supply stability factors of various energy supply subsystems in the multi-source heat pump integrated energy system are set values, and the cumulative sum is 1.

[0067] S2: Draw a time series diagram of the energy conversion efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, analyze the energy conversion efficiency stability coefficient of the multi-source heat pump integrated energy system, and record it as .

[0068] It should be noted that the average energy conversion efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system in each time period during the monitoring period is obtained, and a time series diagram of the energy conversion efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period is drawn.

[0069] It should be noted that the average energy conversion efficiency of the energy supply subsystem within the time period is obtained by: obtaining the energy conversion efficiency of the energy supply subsystem at each sampling time point within the time period, and calculating the average value to obtain the average energy conversion efficiency of the energy supply subsystem within the time period.

[0070] It should be noted that the method for analyzing the energy conversion efficiency stability coefficient of a multi-source heat pump integrated energy system and the method for analyzing the energy supply stability coefficient of a multi-source heat pump integrated energy system have the same principle.

[0071] S3: Draw a time series diagram of the energy storage capacity of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, analyze the energy storage capacity stability coefficient of the multi-source heat pump integrated energy system, and record it as .

[0072] It should be noted that the energy storage capacity of various energy supply subsystems in the multi-source heat pump integrated energy system in each time period during the monitoring period is obtained, and a time series diagram of the energy storage capacity of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period is drawn.

[0073] It should be noted that the method for analyzing the energy storage capacity stability coefficient of a multi-source heat pump integrated energy system and the method for analyzing the energy supply stability coefficient of a multi-source heat pump integrated energy system have the same principle.

[0074] S4: By analyzing the formula Obtain the first evaluation coefficient of the operation stability of the multi-source heat pump integrated energy system ,in They represent the weights of the preset energy supply stability coefficient, energy conversion efficiency stability coefficient, and energy storage capacity stability coefficient, respectively. .

[0075] It should be noted that the weights of the energy supply stability coefficient, the energy conversion efficiency stability coefficient, and the energy storage capacity stability coefficient are set according to their importance in evaluating the stability of the multi-source heat pump integrated energy system. In a specific embodiment, the weights of the energy supply stability coefficient, the energy conversion efficiency stability coefficient, and the energy storage capacity stability coefficient are 0.35, 0.45, and 0.2, respectively.

[0076] As a preferred solution, the specific analysis process of step three also includes: D1: setting each detection time point in each time period within the monitoring period according to the preset equal time interval principle, obtaining the output temperature of each energy supply subsystem in the multi-source heat pump integrated energy system at each detection time point in each time period within the monitoring period, and using the mathematical model establishment method to draw the output temperature change trend curve of each energy supply subsystem in the multi-source heat pump integrated energy system in each time period within the monitoring period over time, analyzing the temperature stability factor of each energy supply subsystem in the multi-source heat pump integrated energy system, and performing weighted average calculation to obtain the temperature stability coefficient of the multi-source heat pump integrated energy system.

[0077] It should be noted that the temperature stability factors of various energy supply subsystems in the multi-source heat pump integrated energy system are analyzed by the following specific method: according to the output temperature change trend curves of various energy supply subsystems in the multi-source heat pump integrated energy system in each time period during the monitoring period, the maximum fluctuation amount and maximum fluctuation frequency of the output temperature of various energy supply subsystems in the multi-source heat pump integrated energy system in each time period during the monitoring period are further obtained, and the average value is calculated to obtain the fluctuation amount and fluctuation frequency of the output temperature of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, and it is substituted into the relationship function between the preset output temperature fluctuation amount and fluctuation frequency and the temperature stability factor to obtain the temperature stability factors of various energy supply subsystems in the multi-source heat pump integrated energy system.

[0078] It should be noted that the fluctuation amount of the output temperature refers to the difference between the peak value and the average value of the output temperature.

[0079] It should be noted that the weights of the temperature stability factors of various energy supply subsystems in the multi-source heat pump integrated energy system are set values, and the cumulative sum is 1.

[0080] D2: Similarly, obtain the pressure stability coefficient and flow stability coefficient of the multi-source heat pump integrated energy system.

[0081] D3: Calculate the weighted average of the temperature stability coefficient, pressure stability coefficient, and flow stability coefficient of the multi-source heat pump integrated energy system to obtain the second evaluation coefficient of the operation stability of the multi-source heat pump integrated energy system, which is recorded as .

[0082] As a preferred solution, the specific analysis process of step 3 also includes: by analyzing the formula Get the operation stability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset operation stability evaluation coefficient.

[0083] It should be noted that the correction factor of the operation stability evaluation coefficient plays the role of amplifying, reducing or rounding the operation stability evaluation coefficient to facilitate calculation and analysis.

[0084] In this embodiment, the present invention evaluates the operating stability of the multi-source heat pump integrated energy system by acquiring the energy supply stability information and performance parameter stability information of the multi-source heat pump integrated energy system, which is conducive to timely warning of faults and targeted maintenance.

[0085] Step 4: Analysis of environmental adaptability of energy system: Obtain the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, and analyze the environmental adaptability evaluation coefficient of the multi-source heat pump integrated energy system.

[0086] As a preferred solution, the specific analysis process of step 4 is: obtain the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, and record it as , Indicates The number of the climate condition type, .

[0087] It should be noted that the types of climate conditions include but are not limited to: high temperature, low temperature, strong wind, heavy rain, etc.

[0088] The energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system stored in the database under the set standard climate conditions is extracted and recorded as .

[0089] It should be noted that the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under set standard climatic conditions is obtained based on historical operating data.

[0090] By analyzing the formula Obtain the environmental adaptability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset environmental adaptability evaluation coefficient, represents the number of energy supply subsystems, Indicates the preset multi-source heat pump integrated energy system The energy supply subsystem is The impact factor under the type of climate conditions.

[0091] It should be noted that the correction factor of the environmental adaptability evaluation coefficient plays the role of amplifying, reducing or rounding the environmental adaptability evaluation coefficient to facilitate calculation and analysis.

[0092] In another specific embodiment, the environmental adaptability of the multi-source heat pump integrated energy system is evaluated by comparing system performance indicators such as temperature stability of the multi-source heat pump integrated energy system under different climatic conditions and standard climatic conditions.

[0093] In this embodiment, the present invention monitors the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, evaluates the environmental adaptability of the multi-source heat pump integrated energy system, and can determine the performance of the system under different environmental conditions, which is beneficial to ensure that the system can function to the maximum extent in various environments and provide continuous and stable energy supply.

[0094] Step 5. Analysis of energy self-sufficiency rate of energy system: Obtain the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period, and analyze the energy self-sufficiency rate evaluation coefficient of the multi-source heat pump integrated energy system.

[0095] As a preferred solution, the specific analysis process of step five is: obtaining the proportion of the energy provided by the multi-source heat pump integrated energy system itself in each time period during the monitoring period to the total energy demand, and calculating the average value to obtain the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period, analyzing the ratio of the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period to the set energy self-sufficiency rate threshold, and obtaining the energy self-sufficiency rate evaluation coefficient of the multi-source heat pump integrated energy system.

[0096] In this embodiment, the present invention, by evaluating the energy self-sufficiency rate of the multi-source heat pump integrated energy system, is beneficial to improving the energy independence of the system, reducing energy costs, promoting sustainable development, and providing a basis for optimizing system design.

[0097] Step 6. Comprehensive evaluation feedback of the energy system: Based on the energy efficiency evaluation coefficient, operation reliability evaluation coefficient, operation stability evaluation coefficient, environmental adaptability evaluation coefficient, and energy self-sufficiency evaluation coefficient of the multi-source heat pump comprehensive energy system, analyze the comprehensive evaluation index of the multi-source heat pump comprehensive energy system and provide feedback.

[0098] It should be noted that the specific analysis process of step six is: calculating the weighted average of the energy efficiency evaluation coefficient, operation reliability evaluation coefficient, operation stability evaluation coefficient, environmental adaptability evaluation coefficient, and energy self-sufficiency evaluation coefficient of the multi-source heat pump integrated energy system to obtain the comprehensive evaluation index of the multi-source heat pump integrated energy system.

[0099] It should be noted that the weights of the energy efficiency evaluation coefficient, the operation reliability evaluation coefficient, the operation stability evaluation coefficient, the environmental adaptability evaluation coefficient, and the energy self-sufficiency rate evaluation coefficient are set values, and the cumulative sum is 1.

[0100] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A comprehensive energy system evaluation method based on multi-source heat pumps, characterized in that: The steps include: Step 1: Energy efficiency analysis of the energy system: Obtain the working hours, energy input and energy output of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode and cooling mode during the monitoring period, and analyze the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system; Step 2: Analysis of the operational reliability of the energy system: Obtain the failure rate, mean time between failures, and mean maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system, and analyze the operational reliability evaluation coefficient of the multi-source heat pump integrated energy system; Step 3: Analysis of energy system operation stability: Obtain the energy supply stability information and performance parameter stability information of the multi-source heat pump integrated energy system, where the energy supply stability information includes the energy supply stability coefficient, energy conversion efficiency stability coefficient, and energy storage capacity stability coefficient; the performance parameter stability information includes the temperature stability coefficient, pressure stability coefficient, and flow stability coefficient; analyze the operation stability evaluation coefficient of the multi-source heat pump integrated energy system; Step 4: Analysis of environmental adaptability of energy system: Obtain the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions, and analyze the environmental adaptability evaluation coefficient of the multi-source heat pump integrated energy system; Step 5: Energy self-sufficiency rate analysis of the energy system: obtain the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period, and analyze the energy self-sufficiency rate evaluation coefficient of the multi-source heat pump integrated energy system; Step 6. Comprehensive evaluation feedback of the energy system: Based on the energy efficiency evaluation coefficient, operation reliability evaluation coefficient, operation stability evaluation coefficient, environmental adaptability evaluation coefficient, and energy self-sufficiency evaluation coefficient of the multi-source heat pump comprehensive energy system, analyze the comprehensive evaluation index of the multi-source heat pump comprehensive energy system and provide feedback.

2. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 1 is characterized in that: The specific analysis process of step 1 includes: The duration of the monitoring cycle is set, and through the energy measuring instruments installed in various energy supply subsystems in the multi-source heat pump integrated energy system, the energy input, energy output, and working time of each operation of various energy supply subsystems in the multi-source heat pump integrated energy system in the heating mode and cooling mode during the monitoring period are obtained.

3. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 2 is characterized in that: The specific analysis process of step 1 also includes: According to the energy input and energy output of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, the energy utilization efficiency of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period is obtained by using the calculation formula of energy utilization efficiency, and the average value is calculated to obtain the average energy utilization efficiency of each energy supply subsystem in the multi-source heat pump integrated energy system in the heating mode during the monitoring period, which is recorded as , Indicates the first The number of the energy supply subsystem, ; Obtain the cumulative working time of various energy supply subsystems in the multi-source heat pump integrated energy system in the heating mode during the monitoring period and record it as ; By analyzing the formula Get the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system in heating mode ,in Indicates the correction factor of the energy efficiency evaluation coefficient in the preset heating mode, Indicates the preset multi-source heat pump integrated energy system Reference energy utilization efficiency of the energy supply subsystem.

4. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 3 is characterized by: The specific analysis process of step 1 also includes: Similarly, the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system in cooling mode is obtained and recorded as ; By analyzing the formula Get the energy efficiency evaluation coefficient of the multi-source heat pump integrated energy system ,in Respectively represent the weight factors of the preset heating mode and cooling mode, .

5. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 3 is characterized by: The specific analysis process of step 2 is as follows: Obtain the historical operating time, historical failure times, and the time points and maintenance duration of each historical failure of various energy supply subsystems in the multi-source heat pump integrated energy system; According to the historical operation time and historical failure times of various energy supply subsystems in the multi-source heat pump integrated energy system, combined with the calculation formula of the failure rate, the failure rate of various energy supply subsystems in the multi-source heat pump integrated energy system is obtained, which is recorded as ; Obtain the interval between each historical fault and the previous adjacent fault of each energy supply subsystem in the multi-source heat pump integrated energy system, and calculate the average value to obtain the average fault-free time of each energy supply subsystem in the multi-source heat pump integrated energy system, which is recorded as ; Get the average maintenance time of various energy supply subsystems in the multi-source heat pump integrated energy system and record it as ; By analyzing the formula Obtain the operation reliability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset operational reliability evaluation coefficient, Indicates the preset multi-source heat pump integrated energy system The impact weight of the energy supply subsystem, , represents a natural constant, They represent the preset thresholds of failure rate, mean time between failures and mean repair time, respectively. They represent the weights of the preset failure rate, mean time between failures and mean maintenance time, respectively. .

6. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 1 is characterized in that: The specific analysis process of step three includes: S1: Divide the monitoring period according to the preset equal time interval principle to obtain each time period within the monitoring period, and obtain the energy supply of each energy supply subsystem in the multi-source heat pump integrated energy system in each time period within the monitoring period; Draw the energy supply time series diagram of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, obtain the standard deviation, coefficient of variation, fluctuation range, and fluctuation frequency of energy supply of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, substitute them into the preset relationship function between the standard deviation, coefficient of variation, fluctuation range, fluctuation frequency of energy supply and the energy supply stability factor, obtain the energy supply stability factor of various energy supply subsystems in the multi-source heat pump integrated energy system, and calculate the weighted average value to obtain the energy supply stability coefficient of the multi-source heat pump integrated energy system, which is recorded as ; S2: Draw a time series diagram of the energy conversion efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, analyze the energy conversion efficiency stability coefficient of the multi-source heat pump integrated energy system, and record it as ; S3: Draw a time series diagram of the energy storage capacity of various energy supply subsystems in the multi-source heat pump integrated energy system during the monitoring period, analyze the energy storage capacity stability coefficient of the multi-source heat pump integrated energy system, and record it as ; S4: By analyzing the formula Obtain the first evaluation coefficient of the operation stability of the multi-source heat pump integrated energy system ,in They represent the weights of the preset energy supply stability coefficient, energy conversion efficiency stability coefficient, and energy storage capacity stability coefficient, respectively. .

7. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 6 is characterized in that: The specific analysis process of step three also includes: D1: According to the preset equal time interval principle, each detection time point is set in each time period within the monitoring period, and the output temperature of each energy supply subsystem in the multi-source heat pump integrated energy system at each detection time point in each time period within the monitoring period is obtained. The output temperature trend curve of each energy supply subsystem in the multi-source heat pump integrated energy system in each time period within the monitoring period is drawn using the mathematical model establishment method. The temperature stability factor of each energy supply subsystem in the multi-source heat pump integrated energy system is analyzed, and the weighted average value is calculated to obtain the temperature stability coefficient of the multi-source heat pump integrated energy system; D2: Similarly, obtain the pressure stability coefficient and flow stability coefficient of the multi-source heat pump integrated energy system; D3: Calculate the weighted average of the temperature stability coefficient, pressure stability coefficient, and flow stability coefficient of the multi-source heat pump integrated energy system to obtain the second evaluation coefficient of the operation stability of the multi-source heat pump integrated energy system, which is recorded as .

8. The comprehensive energy system evaluation method based on multi-source heat pumps according to claim 7 is characterized in that: The specific analysis process of step three also includes: By analyzing the formula Get the operation stability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset operation stability evaluation coefficient.

9. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 3 is characterized by: The specific analysis process of step 4 is as follows: Obtain the energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system under various types of climatic conditions and record it as , Indicates The number of the climate condition type, ; The energy utilization efficiency of various energy supply subsystems in the multi-source heat pump integrated energy system stored in the database under the set standard climate conditions is extracted and recorded as ; By analyzing the formula Obtain the environmental adaptability evaluation coefficient of the multi-source heat pump integrated energy system ,in Represents the correction factor of the preset environmental adaptability evaluation coefficient, represents the number of energy supply subsystems, Indicates the preset multi-source heat pump integrated energy system The energy supply subsystem is The impact factor under different climate conditions.

10. The comprehensive energy system evaluation method based on multi-source heat pump according to claim 6, characterized in that: The specific analysis process of step 5 is as follows: The proportion of the energy provided by the multi-source heat pump integrated energy system itself to the total energy demand in each time period during the monitoring period is obtained, and the average value is calculated to obtain the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period. The ratio of the energy self-sufficiency rate of the multi-source heat pump integrated energy system during the monitoring period to the set energy self-sufficiency rate threshold is analyzed to obtain the energy self-sufficiency rate evaluation coefficient of the multi-source heat pump integrated energy system.

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